Column-clamp.



F. E, SHRINER.'

. COLUMN CLAMP.

APPLICATION man NIM/22.1916.

Patented Aug. 13, 1.918.

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l i TED ,STATES PATENT OJHFICE` FRANK n. SHRINER, or DETROIT, MICHIGAN.

` covLUMN-CLAMVP.

To all whom t may concern:

`Be' it known that I, F RANK E. SHRiNER, a citizen of the United States, residing vat Detroit, county of Wayne, S'taterof Michigan, have invented a certain new and useful Imf provement in Column-Clamps; and declare the following to be a fulljclear, and exact description of the same, such aswill enable others skilled in the art to which it pertains to make and use the same, reference being had to thel accompanying drawings, which form apart of this specification.' This invention relates to clamps for` concrete column forms and itsv Objectis a cheap and efficient device for binding together lthe forms utilized in the construction of a concrete column. In the building of such columns thefform. is'u'sually made of several separate pieces extending longitudinally between the base and cap of the columnv and these pieces are held in positionvby a num'- ber of clamps engaging tightly about .the form and spaced apart verticallythereon. An object of this invention isja clamp -having a base adapted to engage against the form provided with a chain adapted to Apass about the form and a lever by means of whichthe chain may be drawn tightly about .the form. An additionall vobject ofthe invention isaclamp havinga lever for ydrawing `the chain about the form so arranged that, when the chain is drawn taut byl move;- ment of thel lever to, binding position,V the strain tends to hold the lever in such position. Another object of, the invention isa device of the characterdescribedprovided with a lever as stated, that is adjustable in position Yrelative to itslsupport. f These objects and the severalfnovelf features ofthe invention are hereinafter more fully described andclaimed as shown inthe accompanying drawings in which- Figure 1 is a side view of my improved clamp showing the leverin locked position, a portion of the form encircling chain only being shown.

Fig. 2 is a plan view of the clamp.

Fig. 3 is a section of the column and form showing the clamp in position.

Fig. 4 is a detail showing the form of the aperture in which the lever is pivotally mounted and. by means of which the position of the lever may be altered.

Fig. 5 is a detail showing the method of fastening the chain to the base of the clamp.

v 4Speciiication of Letters Patent.

i Application nledlMay22, 19,16. Serial No. 99,053.l

Fig. 6 is a detail of the `jaw or hook enga ed by the freeend of thechain.

imilar characters refer to similar parts throughout the drawing and specification.

The device lconsists of'a base plate or member 1 having a flat'surface for engaging against the side of the form, as may beunderstood from Figs. 1 and 3.:v As may be understood from Fig. 2, side plates or members 2 and '3V are provided extending'upwardV at a right angle to the base. Eachof these members 2 and 3 is 'apertured as shown at 7 in-Fig`4 andy thelever 4 is provided with a forked end 5, each fork ofwhichfis 'provided lwith a stud or bolt 6 extending through thev apertures respectively." The apertures 7 V `are scrollv shaped in formkr and the bolts 6 may occupy a position indicated at 8 or 'at'9, as shown in Fig. 4, ineither of lwhichy positions the lever is pivotallysupported. A' lug 10 'extends upward between the portions 8 and 9 of the aperture, andv when the lever is positioned at the point 9 of the aperture, the lug 10 takes the strain imposed in binding the device about the form. Y

lA movableA member 11 is pivotally supported in the fork of the lever 4 at 12 and the opposite end of themember is provided with two blocks 13 and 14 recessed as indicated at 15 in Fig. 6, to receive avlinkv of the chain 16,'which is passed about the form as may. be understood from .3. The op? posite end of the chain is secured to the base plate 1, which is recessed at 17 lto receive a link of the chain as shown in Fig. 5 and an apertured reinforcing member 'or block 18 is secured tothe plate 1 through which the end link of the chain passes. By' this' arrangement the chain is permanently secured tothe plate 1 and the clamp and'chain are thussecured together, preventing ak loss of either part thereofwhen not in use.

In` operation a column `form is first set up, the plate 1 set in position against one portion thereof, as will be understood from the drawing, and the lever 4 raised to position indicated by dotted lines b. This operation moves the member 11 forwardly to such position that a link of the chain 16 may be passed between the recessed blocks 13 and 14 as indicated in Fig. 2. By then moving the lever backwardly from position b, and finally to position c, the movable lever is drawn backwardly which draws the chain taut about the form, binding parts of the-same together, as will be understood from Fig. l. If the lever be supported at the point 8 of the aperture 7- in the members 2 and 3 and movement of the lever to position 0 does not bind theohain with suflicient degree of strain about the form, the lever may be moved to position and the bolts or studs 6 set to pivot in the point -9 of the aperture 7 to take up the slack in the chain. It is to be noted that when the lever' is in the position indicated at o the strain on the llever at the point l2, which is the pivotal point of the hook member l1, is below the pivotal point of the lever. The strain imposed by the chain, therefore, tends to hold the lever in the position c, and the clamp is thus automatically locked in place as will be readily understood.

In placing the several clamps aboutvthe form, they should be spaced olosely together near the `bottom of theform and farther apart toward the top of the column, forthe reason that the weight of the material lcauses greater bursting st rain at the bottom, re- Ioluiring a more secure fastening of the form at the lower end thereof than at the LOP.

The device is preferably made of malleable iron but may be made of any maf terial suitable for the purpose, and from the foregoing description it may be understood that the device is comparatively inexpensive to manufacture, being simple in form and of but few parts and the labor involved in positioning the clamp about the form is reduced to a minimum.

Having thus briefly described my invention, its utility and mode of operation what I claim and desire to secure by Letters Patent of the United States is l. A clamp for concrete column forms ,comprising a base member adapted to engage against the form, a chain having one end secured to the base member, a pivotally mounted lever, and a hook member pivot ally secured to the lever adapted to engage a link of the chain, the pivotal point of the lever being to one side of the line of strain thereon whereby said lever is held in locked position when under strain,

2. A clamp for forms for oonorete columns comprising a base member adapted to engage the form, a chain having one secured to one end of the base member, said bese member being reeeeeed te reeeive a link of the eliain and having an apertured block or reinforcement threugh rwhich Vthe link peeeee, upright. members en eeeh eide .of the bese member, eeeh having an aperture notched on ,one side, a bifurcated lever the two ends each having a stud engaging inthe aperture ef the respeetve .side member, the Iletehes .of the, aperture providing a setting lfor the studs andrenabling theposition of .the lever to be altered relative to the base, a hook member pivoted tothe lever and lying in the furcation thereof, said member being adapted te engagea link ef the ehap, the nptellee providing a pivotal Support fer the lever at a peint Outside the lpeef Strain on the lever when in lonked position.

i- A clamp for `.CJQIlCrete lColumn forms eernprerg e bese member yadapted te lie egepeb side el? the ferm and prevrled .With parallel upright members on each side, a Chain having' en enel Seeured te the base member, e bfureetefl lever having the ends pveifelly Supported in, the reepeetve members of the base, the supportof the lever and members being such as to allow an ad.- justment of thev lever .longitudinally of the base', and a hook member pivotally supported in the bifurcation of the lever'above the point of pivot of the lever with the said members, said hook member beingadapted to engage@J link of the chain and the kpvot point thereof being below the Vpivot ,pointV of the lever when `the lever is turned to locking position.

In testimony whereof I signrthis specification.

FRAM; E. SHRINER.

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